// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
 
namespace Microsoft.CodeAnalysis.Telemetry
{
    /// <summary>
    /// Feature name used in telemetry.
    /// </summary>
    internal readonly struct TelemetryFeatureName
    {
        private const string LocalKind = "Local";
        private const string RemoteKind = "Remote";
        private const string ExtensionKind = "Extension";
 
        // Local services:
 
        public static readonly TelemetryFeatureName CodeFixProvider = GetClientFeatureName("CodeFixProvider");
        public static readonly TelemetryFeatureName InlineRename = GetClientFeatureName("InlineRename");
        public static readonly TelemetryFeatureName LegacySuppressionFix = GetClientFeatureName("TelemetryFeatureName");
        public static readonly TelemetryFeatureName VirtualMemoryNotification = GetClientFeatureName("VirtualMemoryNotification");
 
        private readonly string _name;
        private readonly string _kind;
 
        private TelemetryFeatureName(string name, string kind)
        {
            _name = name;
            _kind = kind;
        }
 
        private static TelemetryFeatureName GetClientFeatureName(string name)
            => new(name, LocalKind);
 
        public static TelemetryFeatureName GetRemoteFeatureName(string componentName, string serviceName)
            => new(componentName + ":" + serviceName, RemoteKind);
 
        public static TelemetryFeatureName GetExtensionName(Type type)
            => new(type.Assembly.FullName?.StartsWith("Microsoft.", StringComparison.Ordinal) == true ? type.FullName! : "External",
                   ExtensionKind);
 
        public override string ToString()
            => _kind + ":" + _name;
    }
}